I had been working on math for the whole afternoon and the numbers（）before my eyes.A.swam B.had swum为什么选A不选B,理由呢?

—You look tired.—Yes,I non-stop until 8 o'clock.A.had worked B.had been working C.will work D.was workingD,怎么理解 I so busily recently that I ____nnnno time to help you with your math .- I can manage it by myselfA.have been working;have B.have worked; had C.am working; will have D.had been working ;had had .I had been working on it for five years before we got to the shooting stagstage where have you been?we have been looking for you everywhere.i(worked out)a teaching plan in my office.为什么这里不填have been working out.had been working out; had been work out I first met Lisa three years ago.She____at aradio shpo at that time.A.has worked.B.had worked.C.was working.D.had been working. I first met Lisa thhree years ago when we ___at a radio station together.A.have worked B.had been working C.were working D.had worked i _______for three hours when i suddenly became sick.A.had been working B.would work C.have worked D.am working 18.I’ve been working all day,but I feel as if I _______ nothing.A.have been achieved B.were achieving C.had achieved D.am achieving I/we should have been working.是什么意思 I have been working for two days. i have been working lots as By the time you arrive,I'll ( ) working for two hours.A.be B.have be C.had been D.have been Because i have been working Because i have been working hard 92. I first met Lisa three years ago. She _____ at a radio shop at that time.A. has worked B. was working C. had been working D. had worked I first met Lisa three years ago.She ________ at a radio factory at the time.A.has worked B.was working C.had been working D.had worked 2.I first met Lisa three years ago when we _______ at a radio station together.[A] have worked [B] had been working [C] were working [D] had worked if i ...at school,i would be sitting in a comfortable office now这里填的是worked harder 可不可以填had been working hard呢? （会的进...）---I__so busily recently that I___no time to help you with your maths.---That's ok.I can manage it by myself.A.have been working ;haveB.have worked;hadC.am working;will haveD.had been working;had had